98 PCM to 99+ PCM

This is a discussion on 98 PCM to 99+ PCM within the Computer & Tuning forums, part of the LSx Technical Help Section category; Anyone ever swap from a 98 LS1 PCM to a 99+
Theres very little support for the 98 due to ...

98 PCM to 99+ PCM

Anyone ever swap from a 98 LS1 PCM to a 99+
Theres very little support for the 98 due to the off year but a whole lot for the 99+
I assume its more than a simple buy a 99 PCM and have it flashed with my 98 programming...
Thanks!

I have heard of many companies doing 98 pcm tunes, some even have them for sale. I would also look on ebay, I have been researching a pcm tune for my '98 and have not had many problems. If you want a hypertech/diablo tuner you won't find much. Those tuners don't do a whole lot though from what I have heard for the money.

I have heard of many companies doing 98 pcm tunes, some even have them for sale. I would also look on ebay, I have been researching a pcm tune for my '98 and have not had many problems. If you want a hypertech/diablo tuner you won't find much. Those tuners don't do a whole lot though from what I have heard for the money.

i have a hypertech programmer for my 98, didn't have problems to get one. works fine, too. (although it's best for messing with my auto tranny)

I have heard of many companies doing 98 pcm tunes, some even have them for sale. I would also look on ebay, I have been researching a pcm tune for my '98 and have not had many problems. If you want a hypertech/diablo tuner you won't find much. Those tuners don't do a whole lot though from what I have heard for the money.

Hypertech makes a programmer, i have it, bought it cheap so for the mean time its just something to play with
afterwards itll make a nice code reader, nothing more

there are things you can do with the 99+ pcm's such as real time tuning that you can't do with the 98's. There are a few other differences too but the 98 can be tuned just fine. I know Frost says if he owned a 98 he would swap to a 99 pcm but I wouldn't. I don't feel the work involved repinning everything and getting the gas gauge to work and things like that is justified by the gains but that's just my personal opinion. There are positives to having that 99+ pcm for sure, I'm just used to my 98 I guess.

By chance do anyone make an adapted harness for the swap, just an idea but would be great.

It's a very old idea... Find connector that matches the PCM-side (a pcm-equivalent connector) and it can be done. They are not made though, so something new would have to be manufactured and the market for such an item is too small.

It's hard to accept that even if it was made that it's several-hundred dollar cost would be OK when you can accomplish the same thing without that much work as it is...

It's hard to accept that even if it was made that it's several-hundred dollar cost would be OK when you can accomplish the same thing without that much work as it is...[/QUOTE]

I have absolutley no idea what's involved with swapping a "98" PCM for a "99" or later but would like to make the change. I have access to any 4th gen F body PCM or wiring harness that would be needed. Where could I find the instructions necessary to make this change or where to send to have it done?

If you have access to every year harness why modify a 98? just use a 99-up harness and be done with it...

OK, I was not aware that I could do that. Are the connections on a later year harness compatable with the 98 sending/receiving units? Whats the deal on the fuel gauge hookup, that I read, needs to be modified?